CN113909806B - Preparation method of large-diameter stainless steel welded liner carbon fiber fully-wound bottle-type container - Google Patents
Preparation method of large-diameter stainless steel welded liner carbon fiber fully-wound bottle-type container Download PDFInfo
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- CN113909806B CN113909806B CN202111113634.4A CN202111113634A CN113909806B CN 113909806 B CN113909806 B CN 113909806B CN 202111113634 A CN202111113634 A CN 202111113634A CN 113909806 B CN113909806 B CN 113909806B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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Abstract
The utility model discloses a preparation method of a large-diameter stainless steel welded liner carbon fiber fully-wound bottle-type container, which comprises the following steps: selecting a seamless austenitic stainless steel tube as a base material to prepare a cylinder; an austenitic stainless steel plate is adopted to prepare an elliptical head through stamping or cold spinning, and a through hole is formed in the center of the elliptical head; adopting forging integral molding to prepare a cap-shaped bottleneck joint, and processing internal and external threads and a sealing surface on the cap-shaped bottleneck joint; assembling and welding the cylinder body, the elliptical head and the cap-shaped bottleneck joint to prepare a stainless steel welding liner, wherein the assembling and welding adopt single-sided welding and double-sided molding; winding carbon fibers on the outer surface of the stainless steel welding inner container by adopting a combined winding process of orthogonal winding and cross winding to obtain a carbon fiber winding bearing layer; winding glass fiber on the outer surface of the carbon fiber winding bearing layer to obtain a glass fiber winding protective layer; and (5) drying and curing. The utility model adopts the welding forming process, thereby reducing the equipment investment and the process cost of spinning and heat treatment.
Description
Technical Field
The utility model relates to the technical field of high-capacity high-pressure gas storage equipment, in particular to a preparation method of a large-diameter stainless steel welded liner carbon fiber fully-wound bottle-type container.
Background
One of the important end uses of hydrogen energy is fuel cell electric vehicles, and a hydrogen adding station is used as a place for adding hydrogen to the hydrogen fuel cell electric vehicles and is an important infrastructure for the development of the hydrogen energy and the fuel cell electric vehicles. By the end of 2020, about 50 hydrogen stations are built in China, and the number of hydrogen stations in China is estimated to reach 1000 in 2030. At present, the pressure of a hydrogen storage bottle type container in a hydrogenation station is 50MPa, but along with the development of a 70MPa passenger car, the hydrogen storage buffer tank in the station of 90MPa is gradually arranged in the hydrogenation station. The hydrogen storage buffer tank for the hydrogenation station at present mainly comprises a small-volume gas cylinder group, a steel belt staggered high-pressure container and a steel seamless bottle type container group.
The small-volume gas cylinder group for the hydrogenation station is formed by assembling a plurality of seamless steel gas cylinders (1 type), steel liner fiber circumferential winding cylinders (2 type), metal liner fiber full winding cylinders (3 type) and plastic liner fiber winding cylinders (4 type) into four types of gas cylinders.
The small-volume gas cylinder set for the hydrogenation station has the advantages of easiness in pressure classification and volume combination, short manufacturing period, strong field adaptability, simple forming process and low manufacturing cost. Meanwhile, the device has the problems of small unit volume, large number of containers, large leakage points, large safety distance, large one-time investment and high operation cost; because the gas cylinder is regulated by TSG 23 gas cylinder safety technical regulations, the gas cylinder cannot be checked on site regularly, and the gas cylinder needs to be checked by a whole checking station, the implementation of the small-volume gas cylinder group for the hydrogen adding station is difficult, and the operation cost is high.
The steel band staggered winding type high-pressure container is characterized in that a welding cylinder body made of austenitic stainless steel plates and a sealing head made of austenitic stainless steel composite steel plates are assembled and welded into an inner container, and steel bands are wound and welded on the welding cylinder body according to a certain angle so as to improve the bearing capacity of the container; the hydrogen embrittlement resistant material has the advantages of good hydrogen embrittlement resistance, large water volume, small number of containers and few leakage points. Since a large part of the thickness of the container consists of the taping layer, a large amount of welding, inspection and heat treatment effort is required. Compared with other high-pressure containers with other structural types, the steel belt staggered winding type high-pressure container has low production efficiency and high manufacturing cost; meanwhile, the defects of difficult pressure classification and volume combination, complex manufacturing process, long delivery period, high manufacturing cost, weak field adaptability, high operation and maintenance cost and difficult periodic inspection exist.
The steel seamless bottle container is formed by locally heating and spinning and closing up two ends of a seamless steel tube, belongs to an integral weld-free structure, and effectively avoids the defects of cracks, air holes, slag inclusion and the like possibly caused by welding, but the used high-strength steel is sensitive to hydrogen embrittlement, and the technical problems of difficult spinning and closing up and heat treatment exist due to thicker wall thickness.
The low-volume gas cylinder group and the steel belt staggered high-pressure container are limited by the manufacturing cost, the manufacturing period, the combination mode, the capacity and the pressure bearing capacity, and are far from being suitable for the market development. The large-volume carbon fiber fully-wound composite material gas cylinder is used for hydrogen storage of a hydrogen station, and has low sensitivity to hydrogen embrittlement, high cost and limited wide application.
The specification with publication number CN 2535651Y discloses a welded heat-insulating gas cylinder which consists of a liner container, an outer liner container, a heat-insulating layer, a connecting piece between the inner liner and the outer liner, a connecting piece between a protection ring and the outer liner, a base for supporting the gas cylinder and the like. The connection mode between the lower ends of the inner liner and the outer liner is as follows: the molecular sieve tray and the lower end supporting block are respectively welded with the lower end closure of the inner container, the lower end supporting sleeve is welded with the lower end closure of the outer container, and the lower end supporting block is inserted into the central hole of the lower end supporting sleeve after passing through the central hole of the molecular sieve tray. The protection ring is connected with the outer liner, and four protection ring supporting plates are respectively welded with the upper end socket of the outer liner and the protection ring. The welded structure heat-insulating gas cylinder is mainly used for containing low-temperature liquid oxygen, liquid nitrogen, liquid hydrogen and the like, has higher requirements on heat insulation performance and stability performance, but is not suitable for containing compressed gases such as hydrogen, methane, helium and the like due to small capacity and low working pressure.
The specification with the publication number of CN 109604938A discloses a forming method of a thin-wall stainless steel gas cylinder, which adopts a cold drawn tube blank as a blank, and sequentially carries out powerful spinning and necking spinning to obtain a necking spinning part A and a necking spinning part B, then sequentially carries out heat treatment and mechanical processing shaping on the necking spinning part A and the necking spinning part B respectively, and finally welds the processed necking spinning part A and the necking spinning part B together in a welding mode of argon arc welding. The utility model mainly solves the problems of large thickness and large overall weight of the traditional pure steel gas cylinder at present, and can not be applied to the gas cylinder with high pressure and large diameter due to the characteristics of a thin wall structure, and the gas cylinder with high pressure and large diameter possibly causes the risk of failure.
Disclosure of Invention
The utility model aims to provide a preparation method of a large-diameter stainless steel welded liner carbon fiber fully-wound bottle-type container, which reduces the equipment investment and the process cost of spinning and heat treatment in the large-diameter stainless steel welded liner carbon fiber fully-wound bottle-type container through a welding process of the stainless steel welded liner.
A preparation method of a large-diameter stainless steel welded liner carbon fiber fully-wound bottle-type container comprises the following steps:
(1) Preparing a cylinder by taking a seamless austenitic stainless steel pipe as a base material, and processing grooves at two ends of the cylinder;
(2) Preparing an elliptical end socket by adopting an austenitic stainless steel plate through stamping or cold spinning, and forming a through hole in the center of the elliptical end socket, and processing grooves on the straight edge section of the elliptical end socket and the edge of the through hole;
(3) Adopting forging integral molding to prepare a cap-shaped bottleneck joint, and processing internal and external threads and a sealing surface on the cap-shaped bottleneck joint;
(4) Performing assembly welding on the cylinder body, the elliptical head and the cap-shaped bottleneck joint which are respectively obtained in the step (1) to the step (3) through the cooperation among the grooves to prepare a stainless steel welding liner, wherein the assembly welding adopts single-sided welding and double-sided forming;
(5) Winding carbon fibers on the outer surface of the stainless steel welding inner container by adopting a combined winding process of orthogonal winding and cross winding, and filling epoxy resin between the carbon fibers to obtain a carbon fiber winding bearing layer wound outside the stainless steel welding inner container;
(6) Winding glass fibers on the outer surface of the carbon fiber winding bearing layer, and filling epoxy resin between the glass fibers to obtain a glass fiber winding protective layer outside the carbon fiber winding bearing layer;
(7) Transferring the wound stainless steel welding liner to a curing furnace for drying and curing.
Preferably, in the step (1), the substrate is a seamless austenitic stainless steel pipe having a diameter of 406mm to 660mm, a thickness of 8.8 to 16mm, and a designed water capacity of 200L to 2000L.
In the step (4), the specific steps for preparing the stainless steel welding liner by adopting assembly welding are as follows:
(4-1) welding the cap-shaped bottleneck joint and the elliptical head, performing ray detection on the obtained welding line after welding, and polishing the inner and outer surfaces of the welding line after the ray detection is qualified;
and (4-2) assembling the elliptical head and the cylinder, ensuring that the misalignment amount is smaller than a preset error value, and then welding the elliptical head and the cylinder by adopting special welding materials meeting the magnetic phase requirement.
In the step (4), the direct current pulse power supply is adopted for assembly welding, and the peak current, the base value current and the welding speed of the backing welding are determined through experiments.
The peak current mainly determines the penetration of the welding line, and on the premise of unchanged average current, the greater the peak current is, the deeper the penetration of the welding line is; the base value current mainly maintains stable combustion of the current and preheats the base material and the welding wire, and the solidification of the molten pool is accelerated in the time interval of the base value current; the peak current and the base current are obtained through matching with the welding speed and experimental debugging, so that the penetration of the welding seam is ensured, and the surplus height of the welding seam meets the design requirement.
Preferably, an automatic argon arc welding machine is adopted for assembly welding, the welding parameters of the automatic welding machine are stable, and special rotating and fixing tools are matched, so that the quality of welding seams during assembly welding is ensured.
In the step (5), the specific steps of winding carbon fibers on the outer surface of the stainless steel welding liner by adopting a combined winding process of orthogonal winding and cross winding are as follows: when in cross winding, the carbon fiber filaments soaked in the epoxy resin glue solution are subjected to reciprocating winding with the helix angle of 50-65 degrees or-50-65 degrees in the range of the bottle body; when in orthogonal winding, the carbon fiber yarn soaked in the epoxy resin glue solution is subjected to circumferential reciprocating winding in the range of the bottle body; and (3) after cross winding and cross combined winding solidification of the cross winding and the orthogonal winding, obtaining the carbon fiber winding bearing layer wound outside the stainless steel welding liner.
The utility model also provides the large-diameter stainless steel welded liner carbon fiber fully-wound bottle-type container prepared by the method, and the bottle-type container is strong in pressure resistance, simple and convenient to prepare and difficult to corrode.
The utility model provides a full winding bottle container of major diameter stainless steel welding inner bag carbon fiber, includes stainless steel welding inner bag and locates the end plug at stainless steel welding inner bag both ends, stainless steel welding inner bag includes that barrel, center department are equipped with oval head and the cap bottleneck of through-hole connect, the both ends of barrel all weld the oval head that center department is equipped with the through-hole, the through-hole department welding of oval head has cap bottleneck to connect. A carbon fiber winding bearing layer is arranged outside the stainless steel welding inner container, a glass fiber winding protective layer is arranged outside the carbon fiber winding bearing layer, and two ends of the carbon fiber winding bearing layer are propped against the cap-shaped bottleneck joint; the cap-shaped bottleneck joint is connected with the end plug.
Preferably, the ratio of the length to the diameter of the outer surface of the elliptical head is 1.3-2.0: 1, a step of; the anti-fatigue device effectively avoids yarn slipping when the carbon fiber winding bearing layer and the glass fiber winding protective layer are wound, and improves the fatigue resistance of the carbon fiber full-winding bottle-shaped container of the large-diameter stainless steel welding inner container.
The cap-shaped bottleneck joint is provided with an internal thread for sealing connection and an external thread for fixing connection. And the elliptical end socket is connected with the cap-shaped bottleneck joint in a welding mode, so that the processing of threads at the cap-shaped bottleneck joint is facilitated.
Compared with the prior art, the utility model has the advantages that:
1. the large-diameter stainless steel welding liner carbon fiber fully-wound bottle-shaped container is made of austenitic stainless steel, so that the container has good compatibility with compressed gases such as hydrogen, methane, helium and the like, particularly has good compatibility with hydrogen, and hydrogen damage is avoided;
2. the stainless steel welding liner adopts a welding forming process, so that the equipment investment and the process cost of spinning and heat treatment are reduced;
3. the high-strength carbon fiber is adopted for winding, and a pressure-bearing layer is formed after solidification, so that the high-strength carbon fiber can bear 2.5 times of working pressure without failure, and has a large safety margin under the working pressure of 87.5-100 MPa.
Drawings
Fig. 1 is a schematic structural view of a bottle-shaped container with a large-diameter stainless steel welded liner and fully wound with carbon fiber in an embodiment of the utility model.
Fig. 2 is a schematic structural view of the stainless steel welded liner of fig. 1.
Fig. 3 is a schematic view of the structure of the barrel, oval head and cap bottleneck joint of fig. 1.
Fig. 4 is a partially enlarged structural schematic diagram at a in fig. 3.
Fig. 5 is a schematic diagram of the winding of carbon fiber around a bottle container with a welded large diameter stainless steel liner carbon fiber in accordance with an embodiment of the present utility model.
Detailed Description
As shown in fig. 1-4, the large-diameter stainless steel welding liner carbon fiber full-winding bottle-type container comprises a stainless steel welding liner 1 and end plugs 2 at two ends of the bolt stainless steel welding liner 1, wherein the stainless steel welding liner 1 comprises a cylinder body 3, two ends of the cylinder body 3 are welded with an elliptical sealing head 4 with a through hole at the center, and a cap-shaped bottleneck joint 5 is welded at the through hole of the elliptical sealing head 4. The stainless steel welding liner 1 is provided with a carbon fiber winding bearing layer 6, a glass fiber winding protective layer 7 is arranged outside the carbon fiber winding bearing layer 6, and two ends of the carbon fiber winding bearing layer 6 are propped against the cap-shaped bottleneck joint 5.
The cap-shaped bottleneck joint 5 is provided with an internal thread for a sealing connection and an external thread for a fixed connection. And the elliptical end socket 4 and the cap-shaped bottleneck joint 5 are connected in a welding mode, so that the processing of threads at the cap-shaped bottleneck joint 5 is facilitated.
Taking the structure of a stainless steel welded liner carbon fiber fully-wound bottle-type container with the designed water capacity of 2000L as an example, the preparation method is as follows:
(1) And (3) preparing a cylinder body 3 by taking a seamless austenitic stainless steel pipe with the diameter of 620mm, the thickness of 16mm and the design water capacity of 1000L as a base material, and processing grooves at two ends of the cylinder body 3.
(2) The austenitic stainless steel plate is adopted to prepare the steel plate with the length-diameter ratio of 1.8:1, and a through hole with the diameter of 300mm is formed in the center of the elliptical seal head 4, and grooves are formed in the straight edge section of the elliptical seal head 4 and the edge of the through hole.
(3) The cap-shaped bottleneck joint 5 is manufactured by forging integral molding, the outer diameter of the cap-shaped bottleneck joint 5 is 160-195 mm, the inner diameter of the cap-shaped bottleneck joint 5 is 63-77 mm, internal and external threads and sealing surfaces are machined on the cap-shaped bottleneck joint 5, and the diameter of the cap edge of the cap-shaped bottleneck joint 5 is 298mm.
(4) And (3) respectively carrying out assembly welding on the cylinder body 3, the elliptical head 4 and the cap-shaped bottleneck joint 5 obtained in the step (1) to the step (3) through the cooperation among all grooves to prepare a stainless steel welding liner 1, wherein the assembly welding adopts single-sided welding and double-sided molding, and the specific steps are as follows:
and (4-1) welding the cap-shaped bottleneck joint 5 and the elliptical end socket 4, and performing 100% ray detection on the obtained welding line after welding, wherein the technical grade of ray detection is not lower than the AB grade of a corresponding detection method, and the qualification grade of the welding line is not lower than the II grade. And (5) polishing the inner and outer surfaces of the welding seam after the radiation detection is qualified, so that the surplus height of the welding seam is not more than 1mm.
(4-2) assembling the elliptical seal head 4 and the cylinder 3 to ensure that the misalignment amount is less than 1mm; and welding the elliptical seal head 4 and the cylinder body 3, wherein special welding materials meeting the magnetic phase requirements are adopted during welding.
And (3) performing assembly welding by adopting a direct current pulse power supply, and determining the peak current, the base value current and the welding speed of backing welding when the stainless steel welding liner 1 is prepared by assembly welding through experiments. The peak current mainly determines the penetration of the welding line, and on the premise of unchanged average current, the greater the peak current is, the deeper the penetration of the welding line is; the base value current mainly maintains stable combustion of the current and preheats the base material and the welding wire, and the solidification of the molten pool is accelerated in the time interval of the base value current; the peak current and the base current are obtained through matching with the welding speed and experimental debugging, so that the penetration of the welding seam is ensured, and the surplus height of the welding seam meets the design requirement.
(5) The method comprises the following steps of winding carbon fibers on the outer surface of a stainless steel welding inner container 1 by adopting a combined winding process of orthogonal winding and cross winding, filling epoxy resin between the carbon fibers, and obtaining a carbon fiber winding bearing layer 6 wound outside the stainless steel welding inner container after the epoxy resin is solidified, wherein the concrete steps are as follows:
as shown in fig. 5, the ratio of the length to the diameter of the outer surface of the elliptical head 4 is 1.8:1, and the setting of the helix angle of the carbon fiber is realized. When in cross winding, the carbon fiber filaments soaked in the epoxy resin glue solution are subjected to reciprocating winding with the helix angle of 60 degrees or-60 degrees in the range of the bottle body; when in orthogonal winding, the carbon fiber yarn soaked in the epoxy resin glue solution is subjected to circumferential reciprocating winding in the range of the bottle body; and after the cross combination winding solidification of the cross winding and the orthogonal winding, obtaining the carbon fiber winding bearing layer 6 wound outside the stainless steel welding liner 1.
(6) The glass fiber is wound on the outer surface of the carbon fiber winding bearing layer 6, meanwhile, epoxy resin is filled between the glass fibers, and the glass fiber winding protective layer 7 arranged outside the carbon fiber winding bearing layer is obtained after the epoxy resin is solidified, and the concrete steps are as follows:
the glass fiber winding protective layer 7 with the thickness of 2-3 mm is formed between the bottle mouths of the two ends along the axial spiral reciprocating type from one end of the bottle mouth of the stainless steel welding inner container 1, and the glass fiber winding protective layer 7 prevents the impact damage from cutting off the carbon fiber in the carbon fiber winding bearing layer, thereby preventing the formation of local fatigue failure points and the failure of the compression compensation effect of the whole carbon fiber winding bearing layer 6 on the inner container.
(7) Transferring the fully wound carbon fiber bottle-shaped container with the wound stainless steel welding liner into a curing furnace for drying and curing. The solidified stainless steel welded liner carbon fiber fully-wound bottle-shaped container is connected with a water jacket cover and tightly connected, slowly turned to 90 degrees through a hydrostatic test turning frame, vertically placed into a well sleeve, then boosted to the set self-compaction pressure, and maintained for 60s; pressing a hydrostatic test pressure, and maintaining the pressure for 120s; calculating the total expansion, elastic expansion and residual expansion rate, wherein the residual expansion rate is 2%; and finally, cleaning and drying. Because the stainless steel welding liner 1 is made of austenitic stainless steel, the inner wall of the stainless steel welding liner cannot be corroded by a hydrostatic test.
Claims (4)
1. The preparation method of the carbon fiber fully-wound bottle-shaped container with the large-diameter stainless steel welded liner is characterized by comprising the following steps of:
(1) Preparing a cylinder by taking a seamless austenitic stainless steel pipe with the diameter of 406-660 mm, the thickness of 8.8-16 mm and the design water capacity of 200-2000L as a base material, and processing grooves at two ends of the cylinder;
(2) Preparing an elliptical end socket by adopting an austenitic stainless steel plate through stamping or cold spinning, and forming a through hole in the center of the elliptical end socket, and processing grooves on the straight edge section of the elliptical end socket and the edge of the through hole;
(3) Adopting forging integral molding to prepare a cap-shaped bottleneck joint, and processing internal and external threads and a sealing surface on the cap-shaped bottleneck joint;
(4) Performing assembly welding on the cylinder body, the elliptical head and the cap-shaped bottleneck joint which are respectively obtained in the step (1) to the step (3) through the cooperation among the grooves to prepare a stainless steel welding liner, wherein the assembly welding adopts single-sided welding and double-sided forming; performing assembly welding by adopting an automatic argon arc welding machine and a direct current pulse power supply, and determining the peak current, the base value current and the welding speed of backing welding through a test;
the specific steps for preparing the stainless steel welding liner by adopting assembly welding are as follows:
(4-1) welding the cap-shaped bottleneck joint and the elliptical head, performing ray detection on the obtained welding seam after welding, and polishing the inner and outer surfaces of the welding seam after the ray detection is qualified;
(4-2) assembling the elliptical head and the cylinder, ensuring that the assembling misalignment amount is smaller than a preset error value, and then welding the elliptical head and the cylinder;
(5) Winding carbon fibers on the outer surface of the stainless steel welding inner container by adopting a combined winding process of orthogonal winding and cross winding, and filling epoxy resin between the carbon fibers to obtain a carbon fiber winding bearing layer wound outside the stainless steel welding inner container; the specific steps of winding carbon fiber on the outer surface of the stainless steel welding liner by adopting the combination winding process of orthogonal winding and cross winding are as follows:
when in cross winding, the carbon fiber filaments soaked in the epoxy resin glue solution are subjected to reciprocating winding with the helix angle of 50-65 degrees or-50-65 degrees in the range of the bottle body; when in orthogonal winding, the carbon fiber yarn soaked in the epoxy resin glue solution is subjected to circumferential reciprocating winding in the range of the bottle body; after cross winding and cross combined winding solidification of the cross winding and the orthogonal winding are carried out, a carbon fiber winding bearing layer wound outside the stainless steel welding liner is obtained;
(6) Winding glass fibers on the outer surface of the carbon fiber winding bearing layer, and filling epoxy resin between the glass fibers to obtain a glass fiber winding protective layer outside the carbon fiber winding bearing layer;
(7) Transferring the wound stainless steel welding liner to a curing furnace for drying and curing.
2. The carbon fiber full-winding bottle-type container with the large-diameter stainless steel welding liner comprises a stainless steel welding liner and an end plug, and is characterized in that the stainless steel welding liner is manufactured by the manufacturing method according to claim 1, the stainless steel welding liner comprises a cylinder body, two ends of the cylinder body are welded with oval sealing heads, a through hole is formed in the center of each of the oval sealing heads, and cap-shaped bottleneck joints are welded at the through holes of the oval sealing heads; the stainless steel welding inner container is provided with a carbon fiber winding bearing layer outside, a glass fiber winding protective layer is arranged outside the carbon fiber winding bearing layer, two ends of the carbon fiber winding bearing layer are propped against the cap-shaped bottleneck joint, and the cap-shaped bottleneck joint is connected with the end plug.
3. The large-diameter stainless steel welded liner carbon fiber fully-wound bottle container of claim 2, wherein the ratio of the length to the diameter of the outer surface of the elliptical head is 1.3-2.0: 1.
4. the large diameter stainless steel welded inner container carbon fiber full wound bottle container as claimed in claim 2, wherein the cap-shaped bottleneck joint is provided with an internal thread for sealing connection and an external thread for fixing connection.
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| JPS5499747A (en) * | 1978-01-25 | 1979-08-06 | Hitachi Ltd | Reinforcing method for welded joint or stainless steel pipe and construction of welded join of stainless steel pipe |
| CN102554402B (en) * | 2012-01-18 | 2013-11-20 | 江苏中核利柏特股份有限公司 | Welding and heat treatment processes of large-diameter and thick-wall nuclear process pipes |
| CN105605415B (en) * | 2015-09-25 | 2017-11-21 | 石家庄安瑞科气体机械有限公司 | Big volume winds the processing technology of high-pressure hydrogen storage entirely |
| CN109058753B (en) * | 2018-08-06 | 2020-10-16 | 扬州诚德钢管有限公司 | Pressure container bottle for maritime work and production method thereof |
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